MatSetBlockSize#
Sets the matrix block size.
Synopsis#
#include "petscmat.h"
PetscErrorCode MatSetBlockSize(Mat mat, PetscInt bs)
Logically Collective
Input Parameters#
mat - the matrix
bs - block size
Notes#
Block row formats are MATBAIJ and MATSBAIJ formats ALWAYS have square block storage in the matrix.
This must be called before MatSetUp() or MatXXXSetPreallocation() (or will default to 1) and the block size cannot be changed later.
For MATAIJ matrix format, this function can be called at a later stage, provided that the specified block size
is compatible with the matrix local sizes.
See Also#
Matrices, Mat, MATBAIJ, MATSBAIJ, MATAIJ, MatCreateSeqBAIJ(), MatCreateBAIJ(), MatGetBlockSize(), MatSetBlockSizes(), MatGetBlockSizes()
Level#
intermediate
Location#
Examples#
src/ksp/ksp/tutorials/ex4.c
src/ksp/ksp/tutorials/ex55.c
src/ksp/ksp/tutorials/ex71.c
src/ksp/ksp/tutorials/ex56.c
src/snes/tutorials/ex56.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages